- this was necessary because as soon as the gNB starts, it tries detecting
the prach preambles and it mesaures the background noise. However, there is
a delay of several dozens of frames before it considers the preables as
detected.
- the solution at the UE consists in avoiding sending preamble as soon as the
UE syncs by introducing an offset, this keeps the power measurements low at
gNB side as long as the preamble detection counter is under threshold